A-shaped frame and hinged type dumper

Abstract

The utility model relates to a hinged dump truck suspension, in particular to an A-shaped frame and a hinged dump truck. The A-shaped frame comprises a U-shaped frame body with a backward opening and a bearing seat welded to the center of the front portion of the frame body. A bearing is mounted on the bearing seat casting; the U-shaped pipe fitting is formed by welding an upper side plate, a lower side plate, an inner side plate and an outer side plate, the section of the U-shaped pipe fitting is square, and the mounting plates are welded to the two ends of the rear portion of the U-shaped pipe fitting. According to the utility model, the main body of the A-shaped frame is of the welding box-shaped structure, so that the A-shaped frame has the advantages of high strength and light weight, the welding seam arrangement is reasonable, the welding feasibility is improved, and the welding defects are reduced.

Description

Technical Field

[0001] The utility model relates to an articulated dump truck suspension, more specifically, to an A-frame articulated dump truck. Background Art

[0002] Compared with rigid mining dump trucks, articulated mining dump trucks have better adaptability to working conditions and can handle extremely harsh working conditions such as soft and muddy. At present, the front axles of articulated mining dump trucks are generally divided into two types, one is a rigid axle, and the other is an independent suspension axle, using an A-frame structure. The front and rear ends of the A-frame are connected to the drive axle and the frame respectively. It is a longitudinal force transmission element and has high requirements for strength. In order to meet its mechanical performance requirements, the A-frame of the current articulated dump truck is mostly made of integral castings, which have poor processability and heavy weight.

[0003] Chinese patent document CN 213735185 U discloses a lightweight A-frame, which includes a sleeve, an A-frame front, an A-frame left rear, and an A-frame right rear; the sleeve is connected to the A-frame front; the A-frame left rear and the A-frame right rear are symmetrical structures, and the two are connected at the head and then connected to the A-frame front. In this A-frame welding structure, the maximum stress area is near the bearing seat and the A-frame front box 2, and there are weld cracks and plate cracks at this location. Utility Model Content

[0004] The technical problem to be solved by the utility model is the structural strength problem of the existing welded lightweight A-frame, and provides an A-frame and an articulated dump truck.

[0005] The utility model is to achieve the technical solution of: an A-type frame for an articulated dump truck,

[0006] It comprises a U-shaped frame with an opening facing backwards, and a bearing seat welded to the center of the front part of the frame; the bearing seat is a casting, and is provided with a bearing mounting hole for mounting a bearing;

[0007] The frame body comprises an upper side plate, a lower side plate, an inner side plate and an outer side plate welded into a U-shaped pipe fitting with a square cross section, and mounting plates welded to the two ends of the rear part of the U-shaped pipe fitting.

[0008] In the A-type frame of the utility model, the outer side plate includes a left outer side plate and a right outer side plate; the rear part of the bearing seat is square, and its upper and lower sides are welded to the bottom surface of the upper side plate and the top surface of the lower side plate, and its left and right sides are butt-welded to the front ends of the left outer side plate and the right outer side plate respectively.

[0009] In the A-type frame of the utility model, the frame body is mirror-symmetrical about the vertical middle plane.

[0010] In the A-type frame of the utility model, the upper side plate, the lower side plate, the inner side plate and the outer side plate are all formed by connecting a plurality of plates by butt welding, and the butt welds on the upper and lower side plates and the butt welds on the inner and outer side plates are staggered.

[0011] In the A-type frame of the utility model, the upper and lower side plates are both composed of three plates welded together, wherein the length of the middle plate in the left-right direction is greater than the length of the rear part of the bearing seat in the left-right direction; the left outer plate and the right outer plate located on the left and right sides of the bearing seat are both composed of two plates welded together, and the length of the plate located at the rear in the front-to-back direction is less than the length of the plate welded to the mounting plate in the upper and lower side plates; the inner side plate is welded together by three plates, and the length of the middle plate in the left-right direction is not equal to the length of the middle plate in the upper and lower side plates in the left-to-right direction.

[0012] In the A-type frame of the utility model, each plate constituting the outer and inner side plates is a bent plate having at least one bending line.

[0013] In the A-type frame of the utility model, the upper and lower side plates are provided with a lower bending line bending downward and an upper bending line bending upward in sequence from the back to the front, the section of the U-shaped pipe fitting behind the lower bending line is a rear equal-spaced parallel section, the section in front of the upper bending line is a front equal-spaced parallel section, and the section between the lower bending line and the upper bending line is a spacing gradient section; in the rear equal-spaced parallel section, the spacing between the upper side plate and the lower side plate is the same; in the spacing gradient section, the spacing between the upper side plate and the lower side plate changes from large to small from the back to the front; in the front equal-spaced parallel section, the spacing between the upper side plate and the lower side plate is the same; the spacing between the upper and lower side plates in the rear equal-spaced parallel section is greater than the spacing between the upper and lower side plates in the front equal-spaced parallel section.

[0014] In the A-type frame of the utility model, a bolt mounting hole is arranged in the area of ​​the mounting plate opposite to the inner hole of the end of the U-shaped pipe, and a mounting process hole is arranged at the rear of the inner side plate.

[0015] In the A-type frame of the utility model, the bearing installation hole at the front of the bearing seat is through-through from left to right.

[0016] The utility model provides a technical solution for achieving the purpose: an articulated dump truck having the aforementioned A-type frame.

[0017] Compared with the prior art, in the utility model, the main body of the A-frame is a welded box-type structure, which has the advantages of high strength and light weight, reasonable arrangement of welds, improved welding feasibility, and reduced welding defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the A-type frame of the utility model.

[0019] Figure 2It is an exploded schematic diagram of the A-type frame of the utility model.

[0020] Figure 3 It is a schematic diagram of the butt weld arrangement of the A-frame of the utility model.

[0021] Figure 4 It is a top view of the A-type frame of the utility model.

[0022] Figure 5 It is a side view of the A-type frame of the utility model.

[0023] Figure 6 It is a structural schematic diagram of a bearing installed in a bearing seat in an A-type frame of the utility model.

[0024] Figure 7 The utility model is a schematic diagram of the installation of an A-frame in an articulated dump truck.

[0025] Parts names and serial numbers in the figure:

[0026] Bearing seat 10, mounting plate 20, bolt mounting hole 21, U-shaped pipe fitting 30, rubber bearing 40.

[0027] The upper side plate 31 , the upper side plate butt weld 311 , the right rear upper side plate 312 , the left rear upper side plate 313 , and the middle upper side plate 314 .

[0028] Lower side panel 32 , lower side panel butt weld 321 , right rear lower side panel 322 , left rear lower side panel 323 , middle lower side panel 324 .

[0029] The outer panel 33 , the outer panel butt weld 331 , the right rear outer panel 332 , the left rear outer panel 333 , the right front outer panel 334 , and the left front outer panel 335 .

[0030] Inner plate 34 , inner plate butt weld 341 , right inner plate 342 , left inner plate 343 , middle inner plate 344 , and installation process holes 345 .

[0031] The rear portion has an evenly spaced parallel section 35, a lower bending line 351, a gradually changing spacing section 36, an upper bending line 361, and a front portion has an evenly spaced parallel section 37. A-frame 100, axle 200, and frame 300. DETAILED DESCRIPTION

[0032] The specific implementation scheme is described below with reference to the accompanying drawings.

[0033] Figures 1 to 6 The structure of an A-frame 100 in this embodiment is shown.

[0034] like Figure 1 Figure 2As shown, the A-frame 100 is used for an articulated dump truck, and includes a U-shaped frame body with an opening facing backwards, and a bearing seat 10 welded to the center of the front part of the frame body; the bearing seat 10 is a casting, and a rubber bearing 40 is installed thereon.

[0035] The frame body includes an upper side plate 31, a lower side plate 32, an outer side plate 33, and an inner side plate 34 welded into a U-shaped pipe 30 with a square cross section, and mounting plates 30 welded to both ends of the rear portion of the U-shaped pipe 30. The frame body is mirror-symmetrical about the vertical midplane.

[0036] like Figure 2 As shown, the outer plate 33 includes a left outer plate located on the left side of the bearing seat 10 and a right outer plate located on the right side of the bearing seat 10; the rear portion of the bearing seat 10 is square, and its upper and lower sides are welded to the bottom surface of the upper side plate 31 and the top surface of the lower side plate 32, and its left and right sides are butt-welded to the front ends of the left outer plate and the right outer plate, respectively. The bearing seat 10, as a part of the U-shaped pipe fitting 30, is welded to the upper side plate 31, the lower side plate 32, and the left outer plate and the right outer plate.

[0037] The upper plate 31 , the lower plate 32 , the inner plate 34 , and the outer plate 33 are all formed by connecting a plurality of plates by butt welding.

[0038] like Figure 2 As shown, the upper side plate 31 is formed by butt welding three plates, and the three plates of the upper side plate 31 are respectively the right rear upper side plate 312, the left rear upper side plate 313 and the middle upper side plate 314. The right end and the left end of the middle upper side plate 314 correspond to the butt welds of the right rear upper side plate 312 and the left rear upper side plate 313 as the upper side plate butt welds 311.

[0039] The lower side plate 32 is formed by butt welding three plates, and the three plates of the lower side plate 32 are respectively the right rear lower side plate 322, the left rear lower side plate 323 and the middle lower side plate 324. The butt welds at the right and left ends of the middle lower side plate 324 corresponding to the right rear lower side plate and the left rear lower side plate 323 are the lower side plate butt welds 321.

[0040] The rear side plate 34 is formed by butt welding three plates, and the three plates of the rear side plate 34 are respectively a right inner plate 342, a left inner plate 343 and a middle inner plate 344. The right end and the left end of the middle inner plate 344 correspond to the butt welds of the right inner plate 342 and the left inner plate 343 as the inner plate butt welds 341.

[0041] The right outer side plate includes a right rear outer side plate 332 located at the rear and a right front outer side plate 334 located at the front. The left outer side plate includes a left rear outer side plate 333 located at the rear and a left front outer side plate 335 located at the front. The right rear outer side plate 332, the right front outer side plate 334 and the right end of the bearing seat 10 are butt-welded in sequence on the right side of the bearing seat 10, and the left rear outer side plate 333, the left front outer side plate 335 and the left end of the bearing seat 10 are butt-welded in sequence on the left side of the bearing seat 10. The butt welds between the two ends of the right front outer side plate 334 and the right rear outer side plate 332 and the right end of the bearing seat 10, and the butt welds between the two ends of the left front outer side plate 335 and the left rear outer side plate 333 and the left end of the bearing seat 10 are outer side plate butt welds 331.

[0042] The length of the right rear outer panel 332 in the front-to-back direction is smaller than the length of the right rear upper side panel 312 in the front-to-back direction, and is also smaller than the length of the right rear lower side panel 322 in the front-to-back direction, so that the butt weld between the right rear outer panel 332 and the right front outer panel 334 is staggered with the butt weld 311 of the upper side panel and the butt weld 321 of the lower side panel. Similarly, the butt weld between the left rear outer panel 333 and the left front outer panel 335 is staggered with the butt weld 311 of the upper side panel and the butt weld 321 of the lower side panel.

[0043] like Figure 3 As shown, the length of the middle inner panel 343 in the left-right direction is greater than the length of the middle lower panel 324 in the left-right direction, and less than the length of the middle upper panel 314 in the left-right direction, so that the inner panel butt welds 341 at both ends of the middle inner panel 344 are staggered with the upper panel butt welds 311 and the lower panel butt welds 321.

[0044] The width of the rear of the bearing seat in the left and right direction is smaller than the width of the middle lower side plate in the left and right direction, and also smaller than the width of the middle upper side plate in the left and right direction, so that the outer plate butt welds 331 at the left and right ends of the rear of the bearing seat are staggered with the lower side plate butt welds and the upper side plate butt welds.

[0045] The butt welds on each surface of the U-shaped pipe fitting are staggered, which can effectively improve the strength of the U-shaped pipe fitting. Each side plate is made of multiple plate parts butt-welded, which can improve the utilization rate of the plate parts.

[0046] like Figure 5 As shown, the right inner plate 342 and the left inner plate 343 constituting the inner plate 34 are bent plates having one bending line, and the middle inner plate 344 is a bent plate having two bending lines.

[0047] like Figure 4As shown, the right rear outer plate 332 and the left rear outer plate 333 are bent plates with two bending lines, and the right front outer plate 334 and the left front outer plate 335 are bent plates with one bending line. The bending structure of the inner plate 34 and the outer plate 33 makes the pipe formed by welding them into a U-shaped structure with the opening facing backward.

[0048] According to the spacing between the upper side plate 31 and the lower side plate 32, the U-shaped pipe can be divided into a rear equal-spacing parallel section 35, a spacing gradient section 36, and a front equal-spacing parallel section 37 from the rear end to the front end. Figure 5 As shown, the upper side plate 31 and the lower side plate 32 each have two bending lines, namely, a lower bending line 351 located at the rear and an upper bending line 361 located at the front. The upper side plate 31 and the lower side plate 32 are bent downward at the lower bending line 351 and bent upward at the upper bending line 361, thereby forming a rear equidistant parallel section 35, a spacing gradient section 36, and a front equidistant parallel section 37 on the U-shaped pipe fitting. The spacing between the upper side plate 31 and the lower side plate 32 in the rear equidistant parallel section 35 is the same. The spacing between the upper side plate 31 and the lower side plate 32 in the spacing gradient section 36 decreases from large to small from the rear to the front, and the spacing between the upper side plate 31 and the lower side plate 32 in the front equidistant parallel section 37 is the same. The spacing between the upper side plate 31 and the lower side plate 32 in the rear equidistant parallel section 35 is greater than the spacing between the upper side plate 31 and the lower side plate 32 in the front equidistant parallel section 37. The portion of the upper side plate 31 in the rear equally spaced parallel section 35 and the portion of the upper side plate in the front equally spaced parallel section 37 are parallel to each other.

[0049] like Figure 6 As shown, the bearing seat 10 is a casting, and is provided with a bearing hole for installing a bearing, and a rubber bearing 40 is installed in the bearing hole.

[0050] like Figure 2 As shown, the area of ​​the mounting plate 20 opposite to the inner hole of the end of the U-shaped pipe is provided with a bolt mounting hole 21, and the rear of the inner plate 34 is provided with a mounting process hole 345. When the A-frame 100 is connected to the axle 200, bolts are installed through the mounting process holes to fix the mounting plate 20 to the axle 200.

[0051] This embodiment also provides an articulated dump truck, which has the aforementioned A-frame. Figure 7 As shown, the rear end of the A-frame 100 is fixedly connected to the axle 200 via a mounting plate 20 , and the front end is connected to the frame 300 via a rubber bearing 40 on a bearing seat 10 .

[0052] In this embodiment, the main body of the A-frame 10 is a welded box-type structure, which has the advantages of high strength and light weight, reasonable arrangement of welds, improved welding feasibility, and reduced welding defects.

Claims

1. An A-frame for an articulated dump truck, characterized in that: It comprises a U-shaped frame with an opening facing backwards, and a bearing seat welded to the center of the front part of the frame; the bearing seat is a casting, and is provided with a bearing mounting hole for mounting a bearing; The frame body comprises an upper side plate, a lower side plate, an inner side plate and an outer side plate welded into a U-shaped pipe fitting with a square cross section, and mounting plates welded to the two ends of the rear part of the U-shaped pipe fitting.

2. The A-frame according to claim 1, characterized in that: The outer plate includes a left outer plate and a right outer plate; the rear portion of the bearing seat is square, and its upper and lower edges are welded to the bottom surface of the upper plate and the top surface of the lower plate, and its left and right edges are butt-welded to the front ends of the left outer plate and the right outer plate, respectively.

3. The A-frame according to claim 2, characterized in that: The frame is mirror-symmetrical about the vertical midplane.

4. The A-frame according to claim 3, characterized in that: The upper side plate, the lower side plate, the inner side plate and the outer side plate are all formed by connecting a plurality of plates by butt welding, and the butt welds on the upper and lower side plates and the butt welds on the inner and outer side plates are staggered.

5. The A-frame according to claim 4, characterized in that: The upper and lower side panels are both composed of three plates welded together, wherein the length of the middle plate in the left-right direction is greater than the length of the rear part of the bearing seat in the left-right direction; the left outer plate and the right outer plate located on the left and right sides of the bearing seat are both composed of two plates welded together, and the length of the plate located at the rear in the front-to-back direction is less than the length of the plate welded to the mounting plate in the upper and lower side panels; the inner side panel is welded together by three plates, and the length of the middle plate in the left-right direction is not equal to the length of the middle plate in the upper and lower side panels in the left-right direction.

6. The A-frame according to claim 5, characterized in that: Each plate constituting the outer and inner side plates is a bent plate having at least one bending line.

7. The A-frame according to any one of claims 1 to 6, characterized in that: The upper and lower side panels have a downwardly bent lower bending line and an upwardly bent upper bending line from the back to the front, the section of the U-shaped pipe fitting behind the lower bending line is a rear equally spaced parallel section, the section in front of the upper bending line is a front equally spaced parallel section, and the section between the lower bending line and the upper bending line is a spacing gradient section; in the rear equally spaced parallel section, the spacing between the upper side panel and the lower side panel is the same; in the spacing gradient section, the spacing between the upper side panel and the lower side panel changes from large to small from the back to the front; in the front equally spaced parallel section, the spacing between the upper side panel and the lower side panel is the same; the spacing between the upper and lower side panels in the rear equally spaced parallel section is greater than the spacing between the upper and lower side panels in the front equally spaced parallel section; the part of the upper side panel in the rear equally spaced parallel section and the part of the upper side panel in the front equally spaced parallel section are parallel to each other.

8. The A-frame according to claim 7, characterized in that: The area of ​​the mounting plate opposite to the inner hole of the end of the U-shaped pipe is provided with a bolt mounting hole, and the rear part of the inner side plate is provided with a mounting process hole.

9. The A-frame according to claim 1, characterized in that: The bearing installation hole at the front of the bearing seat is through-through from left to right.

10. An articulated dump truck, characterized in that: An A-frame according to any one of claims 1 to 9.

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